C pow function

Question

As we all know that 0.5 == 1/2
when I put the power of number "4"
0.5 the output will be 2 but when I put the power 1/2 the output will be 1
Actually I am solving my task using pow() and i want to make square root of numbers using pow function, instead of using sqrt() function

https://code.sololearn.com/ccSGuLGIoXo3/?ref=app

Answer 1

1 and 2 are integers, so

1/2 == 0 with reminder of 1

NOT 0.5

To get the 0.5 at least one of the two operand must be a floating point number (1.0/2 or 1/2.0 etc.)

also, sqrt uses a specialized algorithm for doing that particular operation, so it's more efficient and precise than using pow with a floating point number whitch is itself an approximation of 0.5

Answer 2

Abdul Moiz i am not sure about type conversion in c but from what i read just now it seems like int/int yields a int , i.e. 1/2==0 , if you want a float then you need to type cast one of those into float , i.e. (float)1/2 returns 0.5

Answer 3

i did, you already got the answer. why do more that doesn't work?

Answer 4

Thank you so much to all community for helping me
I got the answer

Answer 5

The square root of 4 is 2 so it's right.

Answer 6

Please check the code
Comment out put

Answer 7

Try 1.0/2 or 1/2.0 or 1.0/2.0 or (float)1/2 or 1/(float)2

Answer 8

Because
1/2 == 0.5
The output of 0.5 is 2
But 1/2 is 1
Its a logical error

Answer 9

Your question is already answered, but i want to add to Angelo that 0.5 is indeed an exact value in float. 0.5 = 1.0 * 2 ^ -1, this can be stored without approximation. For all other decimal digits, 0.x is approximated